well, get it trough the printer seems to be possible - but I wonder if the ink drys...
I got 100 A4 sheets adhesive for about 22 Euro (~29.90$). Those are the good quality onces from Herma, could get some half priced onces too, but they are not good.
The price is ok for me, as I have nothing to worry about while working. No spray, no waiting time. Simply apply it and rip it off.
regards
Torsten